M50B20

The M50B20 is an internal combustion engine produced by BMW. It is a 2.0-liter, naturally aspirated, inline-six engine. This engine was part of the M50 engine family, which was a successor to the M20 engine. The M50B20 featured a cast-iron block and an aluminum cylinder head. It utilized dual overhead camshafts (DOHC) and four valves per cylinder. Key advancements over its predecessor included the use of VANOS (Variable Valve Timing) on the intake camshaft, which improved torque delivery across the rev range and enhanced fuel efficiency. Ignition was handled by a distributorless ignition system. The M50B20 was known for its smooth operation, characteristic of BMW's inline-six designs, and offered a good balance of performance and economy for its time. It was commonly found in various BMW models, particularly in the 3 Series and 5 Series lineups, during the early to mid-1990s. While not the most powerful variant of the M50 family, it served as a capable and reliable powerplant for everyday driving.